CN111725453A - Lithium battery module with short-circuit protection function - Google Patents

Lithium battery module with short-circuit protection function Download PDF

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Publication number
CN111725453A
CN111725453A CN202010400627.1A CN202010400627A CN111725453A CN 111725453 A CN111725453 A CN 111725453A CN 202010400627 A CN202010400627 A CN 202010400627A CN 111725453 A CN111725453 A CN 111725453A
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CN
China
Prior art keywords
short
battery module
lithium battery
battery cell
protection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010400627.1A
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Chinese (zh)
Inventor
刘昌�
王金全
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hangzhou Qiandai Technology Co ltd
Original Assignee
Hangzhou Qiandai Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hangzhou Qiandai Technology Co ltd filed Critical Hangzhou Qiandai Technology Co ltd
Publication of CN111725453A publication Critical patent/CN111725453A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M10/4264—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing with capacitors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00304—Overcurrent protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

The application discloses lithium battery module with short-circuit protection function includes: the battery cell system comprises a plurality of battery cell units, a bracket, a control panel, a control chip, a protection panel, a fuse and an electronic switch; the battery cell unit comprises a plurality of battery cell units, a plurality of battery cell units and a support, wherein the battery cell units and the support form a whole; the electronic switch is welded on the outer side surface of the protection plate, the fuse is welded on the outer side surface of the protection plate and electrically connected with the electronic switch and the battery cell unit respectively, and the electronic switch is electrically connected to the control chip. The application has the advantages that: the lithium battery module with the short-circuit protection function is reasonable and reliable in structure, convenient to assemble and capable of guaranteeing short-circuit safety from a hardware structure.

Description

Lithium battery module with short-circuit protection function
Technical Field
The application relates to a lithium battery module, concretely relates to lithium battery module with short-circuit protection function.
Background
A "lithium battery" is a type of battery using a nonaqueous electrolyte solution with lithium metal or a lithium alloy as a negative electrode material.
Lithium batteries were first proposed and studied in 1912. Because the chemical characteristics of lithium are very active, the requirements on the environment for processing, storing and using the lithium are very high. With the development of science and technology, lithium batteries have become the mainstream nowadays.
With the further development of science and technology, lithium batteries have become very important electric energy sources in the fields of new energy automobiles and the like, and a single battery cell unit is packaged into a battery module and then is supplemented with a peripheral circuit to form a battery pack which can be used independently.
The existing lithium battery module generally has a risk of short-circuit failure of the battery cell unit due to failure of the BMS module.
Disclosure of Invention
A lithium battery module with a short-circuit protection function comprises:
the battery cell units are used for storing electric energy;
the bracket is used for supporting the battery cell unit;
the control board is at least electrically connected with the battery cell unit;
a control chip soldered to the control board;
lithium battery module with short-circuit protection still includes: a protection board, a fuse and an electronic switch;
the battery cell units and the support form a whole, the control board and the protection board are respectively arranged on two different outer sides of the whole, and the protection board is perpendicular to the control board;
the electronic switch is welded on the outer side face of the protection plate, the fuse is welded on the outer side face of the protection plate and electrically connected with the electronic switch and the battery cell unit respectively, and the electronic switch is electrically connected to the control chip.
Further, the protection board is a PCB board.
Further, the protection plate is parallel to a direction in which the cell units extend.
Furthermore, a plurality of the battery cell units are connected in parallel to form a parallel unit, and one fuse is electrically connected to the positive electrode or the negative electrode of one of the parallel units.
Furthermore, one electronic switch and one of the fuses are correspondingly electrically connected.
Further, the control board is perpendicular to the direction in which the cell units extend.
Furthermore, the protection board is provided with a protection socket, and the control board is provided with a control socket which is electrically connected with the protection socket.
Furthermore, the protection board is provided with a unit socket, and the unit socket and the anode or the cathode of the parallel unit form an electrical connection.
Further, the fuse is soldered between the unit receptacle and the electronic switch.
Further, the protection plate is fixedly connected to the bracket.
The application has the advantages that: the lithium battery module with the short-circuit protection function is reasonable and reliable in structure, convenient to assemble and capable of guaranteeing short-circuit safety from a hardware structure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and their description illustrate the embodiments of the invention and do not limit it.
In the drawings:
fig. 1 is a schematic structural diagram of a lithium battery module according to the present application;
fig. 2 is a schematic circuit structure diagram of a lithium battery module according to the present application;
fig. 3 is a schematic structural view of the lithium battery module shown in fig. 1 with the protection board and the control board removed;
FIG. 4 is an exploded view of the portion shown in FIG. 3;
FIG. 5 is a schematic diagram of an exploded view of the portion shown in FIG. 3;
FIG. 6 is a schematic view of the structure of the stent shown in the portion of FIG. 3;
FIG. 7 is a schematic view of the structure of a cell terminal in the portion shown in FIG. 3;
FIG. 8 is a schematic view of the parallel terminal structure of the portion shown in FIG. 3;
FIG. 9 is a schematic view of a portion of the structure shown in FIG. 3;
fig. 10 is a schematic view of the opposite side of the detail shown in fig. 7.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
Furthermore, the terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1, the lithium battery module 1 includes: protection panel 11, control panel 12, fuse 13, electronic switch 14, control chip 15, unit patch socket 16, capacitor 17, protection patch socket 18, control patch socket 19.
The battery cell unit 102 is used for storing electric energy, the support 101 is used for supporting the battery cell unit 102, and the battery cell units 102 and the support 101 form a whole.
Specifically, the control board 12 and the protection board 11 are respectively disposed on two different outer sides of the whole body, and the protection board 11 is perpendicular to the control board 12; the electronic switch 14 is welded on the outer side surface of the protection plate 11, the fuse 13 is welded on the outer side surface of the protection plate 11 and electrically connected with the electronic switch 14 and the battery cell unit 102 respectively, and the electronic switch 14 is electrically connected to the control chip 15.
Preferably, the protection board 11 is a PCB board. And the protection plate 11 is parallel to the direction in which the cell units 102 extend, in order to obtain a large area.
Preferably, the control board 12 is further provided with a capacitor.
A plurality of the cell units 102 are connected in parallel to form a parallel unit, and one fuse 13 is electrically connected to the positive electrode or the negative electrode of the parallel unit. One electronic switch 14 is electrically connected with one of the fuses 13. The control board 12 is perpendicular to the direction in which the cell units 102 extend. The protection panel 11 is provided with a protection socket 18, and the control panel 12 is provided with a control socket 19 electrically connected with the protection socket 18. The protection plate 11 is provided with a unit socket 16, and the unit socket 16 is electrically connected with the positive pole or the negative pole of the parallel unit. The fuse 13 is soldered between the unit socket 16 and the electronic switch 14. The protection plate 11 is fixedly connected to the bracket 101.
As shown in fig. 2, the control chip can connect different parallel units BT1 to BT4 (the parallel units are connected in series) to two ends of the capacitor C by controlling the electronic switches S1 to S5 and the electronic switches K1 and K2 to perform voltage acquisition and detection, if the control chip fails, it is possible to short the positive and negative electrodes of one parallel unit, such as BT1, so as to bring safety hazards, the protection board is separated from the control board, and the electronic switches S1 to S5 and the fuses F1 to F5 are arranged on the protection board, so that when the control chip fails, the fuses can be fused due to the generation of large current, so as to ensure that the cell unit is not damaged and dangerous.
As shown in fig. 3 to 10, the whole 100 composed of the cell units and the bracket includes: the battery cell comprises a plurality of battery cell units 102, a support 101, a unit terminal 107, a parallel terminal 108 and a connecting assembly.
The battery cell unit 102 is configured to store electric energy. As a specific solution, the battery cell unit 102 may be a 18650 battery cell. Of course, other types of cells may be used.
Specifically, the holder 101 is formed with a fixing groove 106 for fixing an end of the cell unit 102, and the end of the cell unit 102 is embedded in the fixing groove 106. The bottom surface of the fixing groove 106 is perforated to facilitate the connection member to pass through to connect different cell units 102 to form an electrical connection.
Also in order to realize unitized installation, fixing grooves 106 are formed on both sides of the bracket 101, wherein the fixing groove 106 on one side is mainly used for fixing the cell unit 102, and is defined as a first type groove 119; the fixing groove 106 on the other side, in addition to fixing the cell unit 102, also fixes both the unit terminal 107 and the parallel terminal 108, and is defined as a second-type groove 120.
The application is further provided with a sealing piece 104 for sealing the fixing groove 106 of the bracket 101, when assembling, the bracket 101 at the end of the assembly can be sealed by the sealing piece 104, and the bracket 101 in the middle can simultaneously position the battery cell units 102 at two sides.
A unit terminal 107 is mounted at one end of the cell unit 102 and makes contact with another cell unit 102 (the other cell unit 102 is also fixed by the same bracket 101); the unit terminals 107 are disposed in the second type grooves 120, and the second type grooves 120 are formed with a stopper structure capable of stopping the unit terminals 107 and a terminal through-hole 121 for allowing the unit terminal 107 to pass through the holder 101.
Specifically, the cell terminal 107 includes: an annular portion 113, a clamping portion 115, and a contact portion 114.
Wherein the annular portion 113 is configured as a ring; a plurality of clamping parts 115 are arranged on the periphery of the annular part 113 and extend towards the first direction; the contact portion 114 is formed inside the annular portion 113 and extends in a second direction opposite to the first direction.
Specifically, the clamping portion 115 includes at least one arc-shaped structure, so that the clamping portion 115 protrudes toward the cell unit 102. This enables the clamping portion 115 to better clamp the end portion of the cell unit 102.
As a development, the groove wall of the second type groove 120 is provided with a plurality of positioning notches 123, and the clamping portion 115 of the unit terminal 107 can be inserted into the positioning notches 123, so that on one hand, the positioning notches 123 can perform a positioning function on the unit terminal 107, and on the other hand, the positioning notches 123 provide a space for partially accommodating the clamping portion 115.
Specifically, the annular portion 113 is provided therein with a plurality of contact portions 114 formed at and distributed along an inner circumferential edge of the annular portion 113. The contact portion 114 is used to pass through the terminal through-hole 121 of the bracket 101 to contact another cell unit 102. Specifically, the contact portion 114 has a trapezoidal outer surface. The annular portion 113, the nip portion 115, and the contact portion 114 are integrally formed. This configuration is also relatively easy to machine.
The ensemble 100 further comprises: and a parallel terminal 108. The parallel terminal 108 is at least partially inserted into the fixing groove 106 and brought into contact with the cell terminal 107; the holder 101 is formed with parallel passages so that the parallel terminals 108 extend from one fixing groove 106 to the other fixing groove 106 to enable the parallel terminals 108 to make contact with at least two or more cell terminals 107 at the same time.
The parallel terminal 108 includes: a unit portion 116 and a connection portion 117, the unit portion 116 being configured to contact and adhere to the unit portion 116 of the unit terminal 107 to constitute an electrical connection; the connection portion 117 is formed between the different cell portions 116 so that a channel for conducting current is formed between the different cell portions 116. The unit portion 116 may be configured in a circular ring shape.
The parallel terminals 108 are connected to the plurality of cell terminals 107, respectively, so that the plurality of cell units 102 are connected in parallel.
In order to position and accommodate the connection portions 117 of the parallel terminals 108, the holder 101 is formed with communication grooves 122 between the different second-type grooves 120, the connection portions 117 being fitted in the communication grooves 122.
The lead-out terminal 105 includes: a conductive portion 124, a fixed portion 125, and an intermediate portion 126. Wherein the conductive portion 124 is used for contacting the parallel terminal; the fixing part 125 is to be fixed to an outer side of the modular lithium battery module support. The intermediate portion 126 is provided between the conductive portion 124 and the fixed portion 125. The conductive portion 124 is integrally formed with the fixing portion 125.
The outlet terminal 105 may be electrically connected to the protection patch socket 16 as a hardware structure with the parallel unit positive or negative outlet.
The ensemble 100 further comprises: lead-out terminals 105; the outgoing terminal 105 is at least partially disposed in a fixing groove 106 of the holder 101 at an edge and is in contact with at least one of the series terminal and the parallel terminal 108. Another part of which is led out of the range of the holder 101.
As a preferred solution, the whole 100 further comprises: and a lead-out member 118, the lead-out member 118 being fixed at one side wall of the holder 101 and provided with a groove in which a portion of the lead-out terminal 105 located outside the range of the holder 101 is fitted.
Specifically, the whole 100 further includes: and a seal 104, wherein the seal 104 is arranged in the fixing groove 106 of the bracket 101 positioned at the outermost side in the whole 100. The seal 104 acts like a cover to the enclosed space, and it acts to close the outermost fixation grooves 106 (including the first type of groove 119 and the second type of groove 120).
Specifically, the connecting assembly comprises a first connecting piece and a second connecting piece; the first connecting member is connected to one of the brackets 101 and the second connecting member is connected to the other bracket 101 so that the two brackets 101 are integrated. Specifically, the first connecting member is configured as one connecting bolt 103, and the second connecting member is configured as a connecting nut 112; the bracket 101 is formed with a bolt hole 110 through which the coupling bolt 103 passes and a nut groove 111 into which the coupling nut 112 is inserted.
The bracket 101 is provided with a plurality of nut grooves 111, and the nut grooves 111 have a hexagonal structure to receive and position the coupling nuts 112. The whole structure adopts a non-welding process, so that the electric core unit 102 can be conveniently recycled in the later period.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. A lithium battery module with a short-circuit protection function comprises:
the battery cell units are used for storing electric energy;
the bracket is used for supporting the battery cell unit;
the control board is at least electrically connected with the battery cell unit;
a control chip soldered to the control board;
the method is characterized in that:
lithium battery module with short-circuit protection still includes: a protection board, a fuse and an electronic switch;
the battery cell units and the support form a whole, the control board and the protection board are respectively arranged on two different outer sides of the whole, and the protection board is perpendicular to the control board;
the electronic switch is welded on the outer side face of the protection plate, the fuse is welded on the outer side face of the protection plate and electrically connected with the electronic switch and the battery cell unit respectively, and the electronic switch is electrically connected to the control chip.
2. The lithium battery module with the short-circuit protection function as claimed in claim 1, wherein:
the protection board is a PCB board.
3. The lithium battery module with the short-circuit protection function as claimed in claim 2, wherein:
the protection plate is parallel to the extending direction of the battery cell units.
4. The lithium battery module with the short-circuit protection function according to claim 3, wherein:
the battery cell units are connected in parallel to form a parallel unit, and one fuse is electrically connected to the positive electrode or the negative electrode of one parallel unit.
5. The lithium battery module with the short-circuit protection function according to claim 4, wherein:
one electronic switch and one of the fuses are correspondingly electrically connected.
6. The lithium battery module with the short-circuit protection function as claimed in claim 2, wherein:
the control panel is perpendicular to the direction in which the battery cell units extend.
7. The lithium battery module with the short-circuit protection function as claimed in claim 6, wherein:
the protection board is provided with a protection socket, and the control board is provided with a control socket which is electrically connected with the protection socket.
8. The lithium battery module with the short-circuit protection function according to claim 7, wherein:
the protection board is provided with a unit socket which is electrically connected with the anode or the cathode of the parallel unit.
9. The lithium battery module with the short-circuit protection function according to claim 8, wherein:
the fuse is soldered between the unit receptacle and the electronic switch.
10. The lithium battery module with the short-circuit protection function according to claim 9, wherein:
the protection plate is fixedly connected to the bracket.
CN202010400627.1A 2020-04-08 2020-05-13 Lithium battery module with short-circuit protection function Pending CN111725453A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN2020102696291 2020-04-08
CN202010269629 2020-04-08

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Publication Number Publication Date
CN111725453A true CN111725453A (en) 2020-09-29

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CN202010400627.1A Pending CN111725453A (en) 2020-04-08 2020-05-13 Lithium battery module with short-circuit protection function

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Application Number Title Priority Date Filing Date
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113414463B (en) * 2021-08-23 2021-10-29 库尔兹电子科技(南通)有限公司 Welding equipment for lithium battery and protection board

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